IBM Nortel Networks L2/3 Manual page 37

1 2 3 4 5 6
GbESM1
M
M
1
1 2
Blade
Server1
Figure 4-2 BladeCenter Ethernet connectivity
Internal Layer 2 traffic flow in the Nortel Networks L2/3 GbESM
Figure 4-3 shows the internal Layer 2 traffic flow in the Nortel GbESM. The hard coded filter in
the Nortel GbESM blocks all traffic between the external ports and the Management Module
ports. Two Nortel GbESMs in the same BladeCenter chassis exchange Layer 2 frames across
the Management Module. The Nortel GbESM processes BPDUs that reach it via the
Management Module if Spanning Tree is enabled for the Management Module ports. This is
rarely necessary.
Hard-coded filter
2 Management
Module ports
Figure 4-3 Layer 2 frames flow in the Nortel Networks L2/3 GbESM
Chapter 4. Nortel Networks Layer 2/3 GbE Switch Module architecture
1 2
Blade
Server2
6 External ports
14 internal blade ports
Uplinks
1 2 3 4 5 6
GbESM2
GbESM2
M
M
Management
M
M
Module
2
2
1 2
Blade
Blade
Servers
Server14
CPU/AOS
23